Material witness: watching wood dry.


M AERIA L W TN SS For trees, the price of the lightharvesting advantage of height is metastability. Active water loss from the leaf stomata enables sap to be drawn up the tubes of the xylem to a far greater height than vacuum pumping alone could achieve. But it means that the water in the tubes is stretched: under negative pressure and formally in a… (More)
DOI: 10.1038/nmat4095